221144414 has 8 divisors (see below), whose sum is σ = 331779888. Its totient is φ = 110551120.

The previous prime is 221144411. The next prime is 221144419. The reversal of 221144414 is 414441122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221144414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221144411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13874 + ... + 25194.

It is an arithmetic number, because the mean of its divisors is an integer number (41472486).

Almost surely, 2^221144414 is an apocalyptic number.

221144414 is a deficient number, since it is larger than the sum of its proper divisors (110635474).

221144414 is a wasteful number, since it uses less digits than its factorization.

221144414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21090.

The product of its digits is 1024, while the sum is 23.

The square root of 221144414 is about 14870.9251225336. The cubic root of 221144414 is about 604.7260230682.

Adding to 221144414 its reverse (414441122), we get a palindrome (635585536).

The spelling of 221144414 in words is "two hundred twenty-one million, one hundred forty-four thousand, four hundred fourteen".